A. Mohamed et al., ASYMPTOTIC PROPERTIES OF THE WIDTH OF THE LOWEST ENERGY-BAND OF THE DIRAC OPERATOR WITH A PERIODIC POTENTIAL, Helvetica Physica Acta, 66(2), 1993, pp. 192-215
The Dirac operator with a periodic potential has a band spectrum. We l
ocalize these bands in the semi-classical sense, in particular we obta
in a precise asymptotic expansion of the width of the lowest energy ba
nd.